EP1681587A1 - Optical fiber treating device, treating method and optical fiber - Google Patents

Optical fiber treating device, treating method and optical fiber Download PDF

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Publication number
EP1681587A1
EP1681587A1 EP04792846A EP04792846A EP1681587A1 EP 1681587 A1 EP1681587 A1 EP 1681587A1 EP 04792846 A EP04792846 A EP 04792846A EP 04792846 A EP04792846 A EP 04792846A EP 1681587 A1 EP1681587 A1 EP 1681587A1
Authority
EP
European Patent Office
Prior art keywords
optical fiber
gas
light
processing apparatus
fiber processing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP04792846A
Other languages
German (de)
English (en)
French (fr)
Inventor
Dai Shin-Etsu Chemical Co. Ltd. INOUE
HIroshi Shin-Etsu Chemical Co. Ltd. Oyamada
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shin Etsu Chemical Co Ltd
Original Assignee
Shin Etsu Chemical Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shin Etsu Chemical Co Ltd filed Critical Shin Etsu Chemical Co Ltd
Publication of EP1681587A1 publication Critical patent/EP1681587A1/en
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C13/00—Fibre or filament compositions
    • C03C13/04—Fibre optics, e.g. core and clad fibre compositions
    • C03C13/045—Silica-containing oxide glass compositions
    • C03C13/047—Silica-containing oxide glass compositions containing deuterium
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01—Manufacture of glass fibres or filaments
    • C03B37/012—Manufacture of preforms for drawing fibres or filaments
    • C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
    • C03B37/018—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD] by glass deposition on a glass substrate, e.g. by inside-, modified-, plasma-, or plasma modified- chemical vapour deposition [ICVD, MCVD, PCVD, PMCVD], i.e. by thin layer coating on the inside or outside of a glass tube or on a glass rod
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
    • C03C25/60—Surface treatment of fibres or filaments made from glass, minerals or slags by diffusing ions or metals into the surface
    • C03C25/607—Surface treatment of fibres or filaments made from glass, minerals or slags by diffusing ions or metals into the surface in the gaseous phase

Definitions

  • the present invention relates to a gas process of an optical fiber, and more particularly relates to an optical fiber processing apparatus, a process method, and an optical fiber that are used for a gas process of an optical fiber performed by gas including at least heavy hydrogen.
  • the present application also relates to the following application, the contents of which are incorporated herein by reference if applicable.
  • What is most used for a transmission channel making use of an optical fiber is a single mode optical fiber having a zero dispersion wavelength in the neighborhood of 1310nm.
  • the optical fiber has been used for transmission of signal light of 1310nm.
  • the optical fiber is recently being utilized for transmission of signal light with another wavelength according to the advance of a dispersion compensation technique.
  • a CWDM (Coarse Wavelength Division Multiplexing) technique has been developed in order to cope with the increase of a required transmission capacity at low cost. Since the transmission technology uses a wide wavelength interval of about 20nm, interference does not occur between signal wavelengths even if a cheap light source is used. In order to transmit much signal light by means of an optical fiber in this technique, it is desirable that a usable wavelength region is wide. However, a conventional single mode optical fiber has an absorption loss peak caused by an OH radical in the neighborhood of 1383nm, and thus this wavelength region cannot be utilized. In order to be able to use this wavelength region, a low moisture optical fiber is developed, and is prescribed as International Standard even in ITU-TG652 table C, D.
  • a process of an optical fiber by such heavy hydrogen is to put an optical fiber in a container capable of being sealed and leave the optical fiber for predetermined time in an atmosphere containing heavy hydrogen. Since heavy hydrogen is a combustible gas similarly to hydrogen, it is necessary to substitute an atmosphere within the container for an inert gas such as nitrogen to a risk-free extent before filling the container with an atmosphere containing heavy hydrogen.
  • the termination of heavy hydrogen treatment cannot simultaneously be detected.
  • the termination of treatment has conventionally been confirmed by the confirmation of the improvement of resistance to hydrogen of the optical fiber taken and sampled from a processing apparatus after exposing the fiber to an atmosphere containing heavy hydrogen for empirically required time, or the confirmation of the annihilation of an absorption loss peak caused by defect in the vicinity of 630nm after measuring a loss spectrum before or after the heavy hydrogen treatment (see Patent Document 4).
  • an object of the present invention is to monitor a process of an optical fiber by gas containing at least heavy hydrogen and provide an optical fiber processing apparatus, a processing method, and an optical fiber capable of simultaneously detecting the termination of process.
  • an apparatus for processing an optical fiber in a gas atmosphere includes a door of a treatment container that puts the optical fiber in and out, a gas introducing port, a gas exhausting port, and a sampling fiber taking-out port. Further, the apparatus may include a light source that is connected to the optical fiber drawn from the sampling fiber taking-out port, and a light power meter that measures an absorption loss. In order to judge the termination of the gas process, it is preferable to include mechanism that monitors a value of the light power meter and judges the termination from the change of the value.
  • the light source may emit light in a wavelength area in which an absorption loss of the optical fiber is changed by the gas process, and further the wavelength may be an absorption loss peak wavelength of the optical fiber or a wavelength around the peak wavelength.
  • the gas used for the process may be heavy hydrogen or gas containing heavy hydrogen, and a wavelength of light emitted from the light source may be around 630nm.
  • a method for processing an optical fiber in a gas atmosphere includes the steps of: putting the optical fiber in a treatment container; filling the container with treatment gas; drawing the optical fiber from a sampling fiber taking-out port provided in the container to connect the fiber to a light source and a light power meter; monitoring an absorption loss of the optical fiber during processing gas; and simultaneously judging the termination of the gas process from the change of the absorption loss.
  • the termination of the gas process may be judged when an amount of light in a predetermined wavelength arrives at a set amount of light.
  • an optical fiber processing apparatus that processes an optical fiber in a gas atmosphere.
  • the apparatus includes: a container main body that has an opening for putting the optical fiber in and out; a door that opens and closes the opening and forms airtight space between the door and the container main body by closing the opening; a gas introducing port that introduces gas into the space formed by the container main body and the door; a gas exhausting port that exhausts gas from the space formed by the container main body and the door; and an inside-outside connecting section that optically connects an outside of the space formed by the container main body and the door and both ends of the optical fiber accommodated in the space.
  • the inside-outside connecting section may draw and hold both ends of the optical fiber accommodated in the space to the outside of the space. Further, the inside-outside connecting section may be arranged in the container main body. Moreover, the inside-outside connecting section may be detachable from the container main body.
  • the optical fiber processing apparatus may further include: a light source that is arranged outside the space and introduces light into one side of the both ends of the optical fiber accommodated in the space; and a light power meter that is arranged outside the space and measures an amount of light coming out from the other side of the both ends of the optical fiber accommodated in the space.
  • the light source may emit light in a wavelength area in which an absorption loss of the optical fiber is changed by the gas process. Particularly, the light source may emit light with a wavelength around 630nm.
  • the optical fiber processing apparatus may further include a termination judging section that judges that the gas process has been terminated when the amount of light measured by the light power meter has exceeded a threshold value.
  • the optical fiber processing apparatus may further include a termination judging section that judges that the gas process has been terminated when a ratio of the amount of light measured by the light power meter to an amount of light from the light source has exceeded a threshold value. Moreover, the optical fiber processing apparatus may further include a termination judging section that judges that the gas process has been terminated when a rate of change of the amount of light measured by the light power meter has exceeded a threshold value. Moreover, the optical fiber processing apparatus may further include a termination judging section that judges that the gas process has been terminated when a change rate of a ratio of the amount of light measured by the light power meter to an amount of light from the light source has exceeded a threshold value.
  • the optical fiber processing apparatus may further include a gas controlling section that stops the introduction of gas and the exhaustion of gas to the space when the termination judging section judges that the gas process has been terminated.
  • the optical fiber processing apparatus may further include a door-opening controlling section that permits the door to be opened when the termination judging section judges that the gas process has been terminated.
  • Fig. 1 is a view schematically showing an optical fiber processing apparatus of Embodiment 1 of the present invention.
  • Fig. 2 is a graph showing a state of a change of processing time and an amount of transmitted light during processing gas.
  • Fig. 3 is a view schematically showing an optical fiber processing apparatus of Embodiment 2 of the present invention.
  • a port for taking out an optical fiber is provided in a container of a processing apparatus, both ends of the optical fiber to be processed are drawn, light in a wavelength area in which an absorption loss of the optical fiber is changed by a gas process is introduced from the one end, and the intensity of light transmitted through the other end is monitored during processing gas. In this way, the termination of gas process can simultaneously be grasped.
  • the termination of gas process is judged when an amount of light in a predetermined wavelength reaches a set amount of light.
  • gas containing heavy hydrogen is used as treatment gas, and a device emitting light of a wavelength around 630nm is used as a light source. In this way, the change of transmitted light amount (an absorption loss) is monitored.
  • Fig. 1 shows a gas processing apparatus according to Embodiment 1 of the present invention.
  • This processing apparatus includes a container capable of being sealed, which has volume capable of accommodating a bobbin of an optical fiber to be processed with gas.
  • the container is further provided with a gas introducing port, a gas exhausting port, and an optical fiber taking-out port, in addition to a door for putting a bobbin in and out
  • the optical fiber taking-out port can be exchanged, after drawing an optical fiber, the port is blocked up with epoxy resin to ensure seal up of the container.
  • a valve is respectively provided in the gas introducing port and the gas exhausting port. When the container is filled with an enough atmosphere, the valves are closed to seal the container.
  • a nitrogen line and a treatment gas line are further provided in the gas introducing port. Purging the container and introducing treatment gas can be performed from the same gas introducing port.
  • the processing apparatus further includes a light source that introduces monitor light into the optical fiber and a light power meter. Gas including heavy hydrogen is used as treatment gas and an LED with a wavelength of 625nm is used as the light source.
  • An output from the light power meter is input into a computer and the value is always monitored.
  • the computer includes a system that informs a user or the like of the termination of the gas process in a state that the change is settled after a speed of the change of this value exceeds a threshold value set beforehand.
  • the system may be a system that informs a user or the like of the termination of the gas process in a state that the change is settled when a change rate of an output value from the light power meter becomes large once and then becomes small.
  • Fig. 2 is a graph showing a result of a gas process using this processing apparatus.
  • a horizontal axis shows processing time and a vertical axis shows the change of an amount of transmitted light (light power).
  • An amount of transmitted light suddenly increases at the instant of the passage of a certain time, and the termination of the gas process is shown at an arrow B. This state is monitored by the computer.
  • Fig. 3 shows a gas processing apparatus 10 according to Embodiment 2 of the present invention.
  • the optical fiber processing apparatus 10 includes a container 100 having a container main body 110 that has an opening for putting an optical fiber 50 in and out and a door 120 that opens and closes the opening and forms airtight space between the door and the container main body by closing the opening.
  • the optical fiber processing apparatus 10 further includes a lock 122 for locking the door 120 to the container main body 110 when closing the door 120, a gas introducing pipe 130 and a gas exhausting pipe 140 connected to the container 100, an inside-outside connecting section 150 arranged in the container 100, and an LED 20, a light power meter 30, and a PC 40 that are arranged outside the container 100.
  • the gas introducing pipe 130 introduces gas into space formed by the container main body 110 and the door 120 through a gas introducing port 132 provided in the container 100.
  • the gas exhausting pipe 140 exhausts gas from the space formed by the container main body 110 and the door 120 via a gas exhausting port 142 provided in the container 100.
  • Valves 60 and 62 are respectively provided in the gas introducing pipe 130 and the gas exhausting pipe 140. These valves 60 and 62 control flow volume of gas of the gas introducing pipe 130 and the gas exhausting pipe 140.
  • the gas introducing port 132 and the gas exhausting port 142 are arranged in the container main body 110 in the container 100. In this way, when opening and closing the door 120, the gas introducing pipe 130 and the gas exhausting pipe 140 do not obstruct opening and closing.
  • the inside-outside connecting section 150 optically connects an outside of the space formed by the container main body 110 and the door 120 and both ends of the optical fiber 50 accommodated in the space.
  • the inside-outside connecting section 150 is arranged in the container main body 110, draws and holds one end 52 and the other end 54 of the optical fiber 50 accommodated in the space in the container 100 to the outside of the space.
  • the inside-outside connecting section 150 has a taking-out port penetrating through the container main body 110. Seal up of the space in the container 100 is ensured by blocking the taking-out port with epoxy resin after drawing one end 52 and the other end 54 of the optical fiber 50.
  • the inside-outside connecting section 150 is arranged in the container main body 110, when opening and closing the door 120, it is possible to easily open and close the gas introducing pipe 130 without expanding and contracting one end 52 and the other end 54. Moreover, the inside-outside connecting section 150 may be detached from the container main body 110.
  • the LED 20 is optically connected to one end 52 of the optical fiber 50 accommodated in the space in the container 100, and introduces light into the one end 52.
  • the LED 20 emits light in a wavelength area in which an absorption loss of the optical fiber 50 is changed by a gas process.
  • the LED 20 emits light with a wavelength around 630nm.
  • the light power meter 30 is optically connected to the other end 54 of the optical fiber 50 accommodated in the space of the container 100, and measures an amount of light coming out from the other end 54.
  • the PC 40 has a termination judging section 200 for controlling the LED 20 and the PC 40, a gas controlling section 210 for controlling the valve 60 and the valve 62, and a door-opening controlling section 220 for controlling the lock 122.
  • the termination judging section 200 judges that the gas process has been terminated when the amount of light measured by the light power meter 30 has exceeded a threshold value.
  • the termination judging section 200 may judge whether a ratio of the amount of light measured by the light power meter 30 to an amount of light introduced into one end 52 from the LED 20 exceeds a threshold value, in place of the amount of light.
  • the termination judging section 200 may judge whether a change rate of the amount of light measured by the light power meter 30 or a change ratio of the ratio of the amount of light measured by the light power meter 30 to the amount of light introduced into one end 52 from the LED 20 exceeds a threshold value.
  • the gas controlling section 210 stops introducing gas and exhausting gas to the space in the container 100 by restricting flow volume of the valves 60 and 62. In this way, introduction or exhaustion of unnecessary gas can be prevented even after the gas process was terminated. Moreover, when the termination judging section 200 judges that the gas process has been terminated, the door-opening controlling section 220 releases the lock 122 to permit opening of the door 120. In this way, malfunction by opening of the door 120 can be prevented during processing gas.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geochemistry & Mineralogy (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Optics & Photonics (AREA)
  • Manufacturing & Machinery (AREA)
  • General Physics & Mathematics (AREA)
  • Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
EP04792846A 2003-10-28 2004-10-22 Optical fiber treating device, treating method and optical fiber Withdrawn EP1681587A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2003367587A JP2005134469A (ja) 2003-10-28 2003-10-28 光ファイバ処理装置、処理方法及び光ファイバ
PCT/JP2004/015704 WO2005040872A1 (ja) 2003-10-28 2004-10-22 光ファイバ処理装置、処理方法及び光ファイバ

Publications (1)

Publication Number Publication Date
EP1681587A1 true EP1681587A1 (en) 2006-07-19

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ID=34510300

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Application Number Title Priority Date Filing Date
EP04792846A Withdrawn EP1681587A1 (en) 2003-10-28 2004-10-22 Optical fiber treating device, treating method and optical fiber

Country Status (7)

Country Link
US (1) US20060208918A1 (ja)
EP (1) EP1681587A1 (ja)
JP (1) JP2005134469A (ja)
KR (1) KR20060096441A (ja)
CN (1) CN1875301A (ja)
TW (1) TW200523223A (ja)
WO (1) WO2005040872A1 (ja)

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CN101838114A (zh) * 2009-03-20 2010-09-22 德雷卡通信技术公司 光纤的氘气处理方法

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KR100651528B1 (ko) * 2004-06-03 2006-11-29 삼성전자주식회사 광섬유의 수소 민감도를 감소하기 위한 방법
JP2007003721A (ja) * 2005-06-22 2007-01-11 Shin Etsu Chem Co Ltd 光ファイバの処理方法
CN105776897B (zh) * 2016-03-31 2018-03-09 杭州富通通信技术股份有限公司 光纤的制造工艺
CN105948538B (zh) * 2016-07-13 2018-10-09 江东科技有限公司 一种自动化光纤氘气处理设备
CN115206050B (zh) * 2022-07-15 2023-08-01 江苏稻源科技集团有限公司 一种烟雾报警装置

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Publication number Priority date Publication date Assignee Title
CN101838114A (zh) * 2009-03-20 2010-09-22 德雷卡通信技术公司 光纤的氘气处理方法
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CN101838114B (zh) * 2009-03-20 2015-01-07 德雷卡通信技术公司 光纤的氘气处理方法

Also Published As

Publication number Publication date
US20060208918A1 (en) 2006-09-21
CN1875301A (zh) 2006-12-06
KR20060096441A (ko) 2006-09-11
WO2005040872A1 (ja) 2005-05-06
TW200523223A (en) 2005-07-16
JP2005134469A (ja) 2005-05-26

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